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D.24. /sbin/ifup‌


#!/bin/sh

########################################################################

# Begin /sbin/ifup

#

# Description : Interface Up

#

#!/bin/sh

########################################################################

# Begin /sbin/ifup

#

# Description : Interface Up

#


# Authors

#

# Update

#

#

# Version

#

# Notes

#

#

#

# Authors

#

# Update

#

#

# Version

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# Notes

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#

#


########################################################################


up()

{

########################################################################


up()

{


log_info_msg "Bringing up the ${1} interface..."


if ip link show $1 > /dev/null 2>&1; then link_status=`ip link show $1`


if [ -n "${link_status}" ]; then

if ! echo "${link_status}" | grep -q UP; then ip link set $1 up

fi

fi


else

log_failure_msg "Interface ${IFACE} doesn't exist." exit 1

fi


evaluate_retval

}


RELEASE="7.7"


USAGE="Usage: $0 [ -hV ] [--help] [--version] interface" VERSTR="LFS ifup, version ${RELEASE}"


while [ $# -gt 0 ]; do case "$1" in

--help | -h) help="y"; break ;;


--version | -V) echo "${VERSTR}"; exit 0 ;;


-*) echo "ifup: ${1}: invalid option" >&2 echo "${USAGE}" >& 2

exit 2 ;;


*) break ;;

esac done


if [ -n "$help" ]; then echo "${VERSTR}" echo "${USAGE}"

echo

cat << HERE_EOF

ifup is used to bring up a network interface. The interface parameter, e.g. eth0 or eth0:2, must match the trailing part of the interface specifications file, e.g. /etc/sysconfig/ifconfig.eth0:2.


HERE_EOF

exit 0

fi file=/etc/sysconfig/ifconfig.${1}

# Skip backup files

[ "${file}" = "${file%""~""}" ] || exit 0


. /lib/lsb/init-functions


if [ ! -r "${file}" ]; then

log_failure_msg "Unable to bring up ${1} interface! ${file} is missing or cannot be accessed." exit 1

fi


. $file


if [ "$IFACE" = "" ]; then

log_failure_msg "Unable to bring up ${1} interface! ${file} does not define an interface [IFACE exit 1

fi


# Do not process this service if started by boot, and ONBOOT

# is not set to yes

if [ "${IN_BOOT}" = "1" -a "${ONBOOT}" != "yes" ]; then

exit 0

fi


# Bring up the interface

if [ "$VIRTINT" != "yes" ]; then up ${IFACE}

fi


for S in ${SERVICE}; do

if[ ! -x "/lib/services/${S}" ]; then MSG="\nUnable to process ${file}. Either " MSG="${MSG}the SERVICE '${S} was not present " MSG="${MSG}or cannot be executed." log_failure_msg "$MSG"

exit 1

fi done


if [ "${SERVICE}" = "wpa" ]; then log_success_msg; fi


# Create/configure the interface for S in ${SERVICE}; do

IFCONFIG=${file} /lib/services/${S} ${IFACE} up done


# Set link up virtual interfaces if [ "${VIRTINT}" == "yes" ]; then

up ${IFACE}

fi


# Bring up any additional interface components for I in $INTERFACE_COMPONENTS; do up $I; done


# Set MTU if requested. Check if MTU has a "good" value. if test -n "${MTU}"; then

if [[ ${MTU} =~ ^[0-9]+$ ]] && [[ $MTU -ge 68 ]] ; then for I in $IFACE $INTERFACE_COMPONENTS; do

ip link set dev $I mtu $MTU; done

else

log_info_msg2 "Invalid MTU $MTU"



fi

fi


# Set the route default gateway if requested if [ -n "${GATEWAY}" ]; then

if ip route | grep -q default; then

log_warning_msg "Gateway already setup; skipping." else

log_info_msg "Adding default gateway ${GATEWAY} to the ${IFACE} interface..." ip route add default via ${GATEWAY} dev ${IFACE}

evaluate_retval

fi

fi


# End /sbin/ifup

fi

fi


# Set the route default gateway if requested if [ -n "${GATEWAY}" ]; then

if ip route | grep -q default; then

log_warning_msg "Gateway already setup; skipping." else

log_info_msg "Adding default gateway ${GATEWAY} to the ${IFACE} interface..." ip route add default via ${GATEWAY} dev ${IFACE}

evaluate_retval

fi

fi


# End /sbin/ifup


: Nathan Coulson - nathan@linuxfromscratch.org Kevin P. Fleming - kpfleming@linuxfromscratch.org

: Bruce Dubbs - bdubbs@linuxfromscratch.org

: Nathan Coulson - nathan@linuxfromscratch.org Kevin P. Fleming - kpfleming@linuxfromscratch.org

: Bruce Dubbs - bdubbs@linuxfromscratch.org

: LFS 7.0


: the IFCONFIG variable is passed to the scripts found

in the /lib/services directory, to indicate what file the service should source to get interface specifications.

: LFS 7.0


: the IFCONFIG variable is passed to the scripts found

in the /lib/services directory, to indicate what file the service should source to get interface specifications.

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